Solar concentrating systems are optical systems that concentrate solar energy for conversion into usable energy. Ideally, a solar concentrating system should have the following favorable properties as design criteria: (i) energy-efficient, (ii) cost-effective to construct, and (iii) highly durable and costeffective maintain, even in the presence of high temperature variations, wind and sand loa...

If two parties, Alice and Bob, share some number, n, of partially entangled pairs of qubits, then it is possible for them to concentrate these pairs into some smaller number of maximally entangled states. We present a simplified version of the algorithm for such entanglement concentration, and we describe efficient networks for implementing these operations.

1. We studied urine concentrating ability in ten magnesium-depleted puppies and compared the results with those of match-fed, littermate controls. 2. The experimental puppies became hypomagnesaemic and hypocalcaemic without evidence of potassium depletion. After 24 h of food and water deprivation, urine osmolality increased to 1350k 340 mosm/kg of water. This value did not differ from that of c...

The crustacean red pigment concentrating hormone (RPCH) has been localized in neurons of the crayfish abdominal nerve cord and modulates the crayfish swimmeret rhythm. An antibody to RPCH labels a small set of cell bodies and axons in each abdominal ganglion. Physiological experiments in which RPCH was perfused into the ganglia of isolated nerve cords showed that RPCH modulated the swimmeret rh...

Aquaporin-1 (AQP1) and aquaporin-3 (AQP3) water channels expressed in the kidney play a critical role in the urine concentrating mechanism. Mice with AQP1 or AQP3 deletion have a urinary concentrating defect. To better characterize this defect, we studied the influence of an acute urea load (300 mumol ip) in conscious AQP1-null, AQP3-null, and wild-type mice. Urine was collected and assayed eve...

BACKGROUND AND OBJECTIVES Polyuria, polydipsia, and nephrogenic diabetes insipidus have been associated with use of psychotropic medications, especially lithium. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS The impact of psychotropic medications on urinary concentrating ability and urinary aquaporin 2 (AQP2) excretion was investigated after overnight fluid deprivation, and over 6 h after 40 ...